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Pulse-position modulation

About: Pulse-position modulation is a(n) research topic. Over the lifetime, 3916 publication(s) have been published within this topic receiving 72057 citation(s). The topic is also known as: PPM. more


Open access
01 Nov 1985-
Abstract: Spread Spectrum It’s not just for breakfast anymore! Don't blame me, the title is the work of this month's guest columnist, Steve Bible, N7HPR ( While cruising the net recently, I noticed a sudden bump in the number of times Spread Spectrum (SS) techniques were mentioned in the amateur digital areas. While QEX has discussed SS in the past, we haven't touched on it in this forum. Steve was a frequent cogent contributor, so I asked him to give us some background. Steve enlisted in the Navy in 1977 and became a Data Systems Technician, a repairman of shipboard computer systems. In 1985 he was accepted into the Navy’s Enlisted Commissioning Program and attended the University of Utah where he studied computer science. Upon graduation in 1988 he was commissioned an Ensign and entered Nuclear Power School. His subsequent assignment was onboard the USS Georgia, a trident submarine stationed in Bangor, Washington. Today Steve is a Lieutenant and he is completing a master’s degree in computer science at the Naval Postgraduate School in Monterey, California. His areas of interest are digital communications, amateur satellites, VHF/UHF contesting, and QRP. His research area closely follows his interest in amateur radio. His thesis topic is Multihop Packet Radio Routing Protocol Using Dynamic Power Control. Steve is also the AMSAT Area Coordinator for the Monterey Bay area. Here's Steve, I'll have some additional comments at the end. more

Topics: Pulse shaping (68%), Pulse-position modulation (66%), Delta modulation (66%) more

8,574 Citations

Open accessBook
Joseph M. Kahn1, John R. BarryInstitutions (1)
31 Aug 1994-
Abstract: The use of infrared radiation as a medium for high-speed short-range wireless digital communication is discussed. Available infrared links and local-area networks are described. Advantages and drawbacks of the infrared medium are compared to those of radio and microwave media. The physical characteristics of infrared channels using intensity modulation with direct detection (IM/DD) are presented including path losses and multipath responses. Natural and artificial ambient infrared noise sources are characterized. Strategies for designs of transmitter and receivers that maximize link signal-to-noise ratio (SNR) are described. Several modification formats are discussed in detail, including on-off keying (OOK) pulse-position modulation (PPM), and subcarrier modulation. The performance of these techniques in the presence of multipath distortion is quantified. Techniques for multiplexing the transmissions of different users are reviewed. The performance of an experimental 50-Mb/s on-off-keyed diffuse infrared link is described. more

2,777 Citations

Journal ArticleDOI: 10.1109/26.843135
Moe Z. Win1, Robert A. Scholtz2Institutions (2)
Abstract: Attractive features of time-hopping spread-spectrum multiple-access systems employing impulse signal technology are outlined, and emerging design issues are described. Performance of such communications systems in terms of achievable transmission rate and multiple-access capability are estimated for both analog and digital data modulation formats under ideal multiple-access channel conditions. more

Topics: Spread spectrum (58%), Communications system (57%), Modulation (55%) more

2,659 Citations

Journal ArticleDOI: 10.1109/4234.660796
Moe Z. Win1, Robert A. ScholtzInstitutions (1)
Abstract: Impulse radio, a form of ultra-wide bandwidth (UWB) spread-spectrum signaling, has properties that make it a viable candidate for short-range communications in dense multipath environments. This paper describes the characteristics of impulse radio using a modulation format that can be supported by currently available impulse signal technology and gives analytical estimates of its multiple-access capability under ideal multiple-access channel conditions. more

Topics: Impulse (physics) (56%), Multipath propagation (55%), Pulse-position modulation (55%) more

2,351 Citations

Open accessBook
01 Jan 1966-
Abstract: An introductory, graduate-level look at modern communications in general and radio communications in particular. This seminal presentation of the applications of communication theory to signal and receiver design brings you valuable insights into the fundamental concepts underlying today's communications systems, especially wireless communications. Coverage includes AM, FM Phase Modulation, PCM, fading, and diversity receivers. more

Topics: Communications system (63%), Wireless (56%), Fading (55%) more

1,401 Citations

No. of papers in the topic in previous years

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Topic's top 5 most impactful authors

Zabih Ghassemlooy

54 papers, 859 citations

Tomoaki Ohtsuki

30 papers, 365 citations

Hossam M. H. Shalaby

27 papers, 601 citations

Robert A. Cryan

26 papers, 182 citations

Jaafar M. H. Elmirghani

24 papers, 255 citations

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